日期:2014-05-16 浏览次数:20344 次
<!-- LCTestJS_functions.html version: 2012_01_11 --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>测试javascript的函数 version: 2012_01_11</title> <style> h3 { color: #FFF; background-color: #09F; font-style: normal; font-weight: bold; } h4 { font-weight: bolder; color: #d00; background-color: #CCC; } h5{ background-color: #FFC; color: #000; font-size: 18px; } </style> </head> <body> <h2>测试javascript的函数 version: 2012_01_11</h2> <h3>函数赋值给变量(也可以赋值给对象的成员变量)</h3> <h5> function square(x){return x*x;} <br>var funcVar=square; <br>或者 var funcVar=function(x){return (x*x);}; </h5> <script type="text/javascript"> function square(x) { return x * x; } //var funcVar = square; var funcVar=function(x){return (x*x);}; document.write("<p>funcVar(5)=" + funcVar(5)); </script> <!-- ---------------------- --> <h3>函数数组</h3> <h5> function sqrt(x){return Math.sqrt(x);} <br>var funcArray=[square,sqrt]; </h5> <script type="text/javascript"> function sqrt(x){return Math.sqrt(x);} //var funcVar2 = sqrt; var funcArray=[square,sqrt]; document.write("<p>funcArray[0](4)=" + funcArray[0](4)); document.write("<br>funcArray[1](4)=" + funcArray[1](4)); </script> <!-- ---------------------- --> <h3>函数作为其他函数的参数</h3> <h5> function func1SubFunc2(func1,func2,x){return func1(x)-func2(x);} </h5> <script type="text/javascript"> function func1SubFunc2(func1,func2,x){return func1(x)-func2(x);} document.write("<p>func1SubFunc2(square,sqrt,4)=" + func1SubFunc2(square,sqrt,4)); </script> <!-- ---------------------- --> <h3>函数作为返回值</h3> <h5> function returnFunc(x){if(x==1)return square;else return sqrt;} </h5> <script type="text/javascript"> function returnFunc(x){if(x==1)return square;else return sqrt;} document.write("<p>returnFunc(1)(4)=" + returnFunc(1)(4)); document.write("<p>returnFunc(2)(4)=" + returnFunc(2)(4)); </script> <!-- ---------------------- --> <h3>匿名函数</h3> <h5> (function(x) {return(x+7);})(10); -> ? 17 </h5> <script type="text/javascript"> document.write("<p>(function(x) {return(x+7);})(10)=" + (function(x) {return(x+7);})(10)); </script> </body> </html>
<!-- LCTestJS_functionsAdvanced.html version: 2012_01_11 --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>测试javascript的函数 (高级) version: 2012_01_11</title> <style> h3 { color: #FFF; background-color: #09F; font-style: normal; font-weight: bold; } h4 { font